公开(公告)号：US20230018233A1

公开(公告)日：2023-01-19

申请号：US17949901

申请日：2022-09-21

Applicant: Valve Corporation

Inventor： Joshua Mark Hudman ,  Kameron Wade Rausch

IPC: G06F3/01 ,  G06F3/0346 ,  G06F3/03 ,  G02F1/01 ,  G02F1/139

Abstract: Systems and methods for tracking the position of a head-mounted display (HMD) system component. The HMD component may carry a plurality of angle sensitive detectors that are able to detect the angle of light emitted from a light source. The HMD component may include one or more scatter detectors that detect whether light has been scattered or reflected, so such light can be ignored. Control circuitry causes light sources to emit light according a specified pattern, and receives sensor data from the plurality of angle sensitive detectors. The processor may process the sensor data and scatter detector data, for example using machine learning or other techniques, to track a position of the HMD component. An angle sensitive detector may include a spatially-varying polarizer having a position-varying polarizing pattern and one or more polarizer layers that together are operative to detect the angle of impinging light.

公开(公告)号：US20210149481A1

公开(公告)日：2021-05-20

申请号：US17156295

申请日：2021-01-22

Applicant: Valve Corporation

Inventor： Joshua Mark Hudman

IPC: G06F3/01 ,  G06T7/246 ,  G09G5/00 ,  G02B27/01 ,  G06F3/0346

Abstract: Systems and methods for tracking the position of a head-mounted display (HMD). The HMD may include a support structure that carries a forward facing camera and a plurality of optical flow sensor integrated circuits (ICs). The forward camera captures image sensor data in a forward camera field of view (FOV) at a first frame rate, and each of the plurality of sensor ICs captures image sensor data in a respective plurality of sensor IC FOVs at a second frame rate. The sensor IC FOVs may collectively cover at least a substantial portion of the forward camera FOV. A processor may receive the image sensor data from the camera and the plurality of sensor ICs. The processor may process the received image sensor data and/or other sensor data (e.g., IMU data) to track a position of the head-mounted display based on the processing of the received sensor data.

公开(公告)号：US20210072533A1

公开(公告)日：2021-03-11

申请号：US16692823

申请日：2019-11-22

Applicant: Valve Corporation

Inventor： Joshua Mark Hudman ,  Ivan A. McCracken

IPC: G02B27/00 ,  G02B27/28 ,  G02B5/30

Abstract: A head-mounted display, or other near-to-eye display, incorporates optics that include a spatially-varying retarder (SVR). The SVR may be manufactured with a correction factor applied thereto in order to compensate for one or more manufacturing errors that are exhibited in a molded lens and/or a polarizing beam splitter included in the optics of the system.

公开(公告)号：US10764558B2

公开(公告)日：2020-09-01

申请号：US16144805

申请日：2018-09-27

Applicant: Valve Corporation

Inventor： Joshua Mark Hudman ,  Kameron Wade Rausch

IPC: H04N13/239 ,  H04N13/344 ,  G02B13/06

Abstract: Systems and methods of providing stereo depth cameras for head-mounted display systems that require less memory and/or processing power. The stereo depth camera may include a left camera and a right camera spaced apart from each other by a distance. Each of the left and right cameras may be skewed outward by a non-zero angle from a forward direction of the head-mounted display system to provide a relatively wide field of view for the stereo depth camera. Each of the left and right cameras may include a camera sensor array and a camera lens positioned forward of the camera sensor array. Each of the camera lenses may include an optical axis that is laterally offset from the center of the associated camera sensor array toward a center of the support structure to center the left camera lens substantially on a scene center or principal point.

公开(公告)号：US20190258063A1

公开(公告)日：2019-08-22

申请号：US16273054

申请日：2019-02-11

Applicant: Valve Corporation

Inventor： Joshua Mark Hudman

IPC: G02B27/01 ,  G06F3/01 ,  G06T19/00 ,  G02F1/1335 ,  G02F1/13357

Abstract: Methods and systems relating generally to information displays, and more particularly to systems and methods for backlight assemblies for information displays that emit an angularly narrow cone of light. A backlight assembly that emits a narrow angular cone of light can be particularly beneficial in a head-mounted display configuration, such as for use as part of virtual reality or augmented reality systems, where the head-mounted display comprises a lens assembly that directs light from an information display to the eyes of the user. Such a backlight assembly configuration may help reduce undesirable visual effects like flood illumination, ghost images, glare, and scattering.

公开(公告)号：US20180081092A1

公开(公告)日：2018-03-22

申请号：US15704813

申请日：2017-09-14

Applicant: Valve Corporation

Inventor： Joshua Mark Hudman

IPC: G02B3/08 ,  G02B3/04

CPC classification number: G02B3/08 ,  G02B3/04 ,  G02B27/0172 ,  G02B2027/0132

Abstract: Systems and methods for providing optical systems which utilize double Fresnel lenses on curved surfaces for use with display systems, such as silicon-based micro display systems (e.g., OLED micro displays) used with head mounted display (HMD) systems. The optical systems disclosed herein may implement multiplexing or blending to provide a smooth profile transition and reduce aberrations between zones or fields (e.g., small FOV angles, large FOV angles) of a Fresnel surface which is defined by multiple Fresnel patterns or functions. An optical system for a micro display is provided which utilizes double Fresnel lenses on curved surfaces to shorten the focal length while maintaining a good shape factor for moldability and aberration control.

公开(公告)号：US11846798B2

公开(公告)日：2023-12-19

申请号：US17711856

申请日：2022-04-01

Applicant: Valve Corporation

Inventor： Joshua Mark Hudman ,  Douglas Vanderwel

IPC: G02F1/136 ,  F21V8/00 ,  G06F1/16

CPC classification number: G02B6/0061 ,  G02B6/003 ,  G02B6/0036 ,  G02B6/0043 ,  G02B6/0068 ,  G06F1/163

Abstract: A head-mounted display device includes a display panel (such as a liquid crystal display), an optics system for focusing a portion of the display onto an eye of a user, and a backlight assembly including a light guide, a plurality of extraction features positioned on a surface of the light guide, and at least one laser diode for directing light into the light guide. The light guide is sized and dimensioned to illuminate only a portion of the display that is focused by the optics system; with the plurality of light extraction features configured to diffuse light toward the display panel for back illuminating the display panel.

公开(公告)号：US11841507B2

公开(公告)日：2023-12-12

申请号：US17166887

申请日：2021-02-03

Applicant: Valve Corporation

Inventor： Joshua Mark Hudman

IPC: G02B27/01 ,  G02B27/00 ,  G02B5/30 ,  G02B27/28

CPC classification number: G02B27/0172 ,  G02B5/3016 ,  G02B5/3083 ,  G02B27/0093 ,  G02B27/286 ,  G02B2027/011 ,  G02B2027/014 ,  G02B2027/0147

Abstract: An optical system is provided. The optical system includes a gaze tracker operative to track a gaze of a user and output data representative of the gaze and a correction portion including multiple spatially varying polarizers. A first polarizer of the spatially varying polarizers has a first control input configured to receive a first control signal indicating whether the first polarizer is to be active or inactive. The first polarizer, when active, provides a first optical correction on light passing through at a location corresponding to a first region of a virtual image. The optical system includes a controller configured to receive the data representative of the gaze, determine, based on the gaze, whether to implement the first optical correction on the light and in response to determining to implement the first optical correction on the light, output the first control signal indicating the first polarizer is to be active.

公开(公告)号：US20230375842A1

公开(公告)日：2023-11-23

申请号：US18362629

申请日：2023-07-31

Applicant: Valve Corporation

Inventor： Joshua Mark Hudman

IPC: G02B27/01 ,  G02B27/28 ,  G02B5/18 ,  G02B5/30 ,  F21V8/00 ,  G02B27/42

CPC classification number: G02B27/0172 ,  G02B27/283 ,  G02B5/18 ,  G02B5/3016 ,  G02B6/0023 ,  G02B6/005 ,  G02B5/3083 ,  G02B27/4205 ,  G02B2027/0112 ,  G02B6/29311

Abstract: The present disclosure is related generally to techniques for improving the performance and efficiency of display systems, such as laser scan beam display systems or other types of display systems (e.g., micro-displays) of an HMD system or other device. Display systems of the present disclosure may utilize polarization multiplexing that allow for improved optimization of diffraction optics. In at least some implementations, a display system may selectively polarize light dependent on wavelength (e.g., color) or field of view. An optical combiner may include polarization sensitive diffractive optical elements that are each optimized for a subset of colors or portions of an overall field of view, thereby providing improved correction optics for a display system.

公开(公告)号：US20230283761A1

公开(公告)日：2023-09-07

申请号：US18316805

申请日：2023-05-12

Applicant: Valve Corporation

Inventor： Joshua Mark Hudman

IPC: H04N13/337 ,  G02B27/01 ,  G02B27/28 ,  H04N13/339

CPC classification number: H04N13/337 ,  G02B27/0172 ,  G02B27/286 ,  H04N13/339 ,  G02B2027/0178

Abstract: The present disclosure related generally to techniques for improving the performance and efficiency of display systems, such as laser scan beam display systems or other types of display systems (e.g., micro-displays). Display systems of the present disclosure may include a polarization compensation optic, such as a spatially varying polarizer, that provides phase retardation that varies as a function of position, which provides polarization compensation to provide light that is well suited for a polarization sensitive optic of the display system, such as a waveguide-based optical system, a pancake optical system, a birdbath optical system, a coating-based optical system, etc. The display systems of the present disclosure may be components of head-mounted display systems, or other types of display systems.